Cutter-head



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G. J. 8L. S.'J. SHIMER.

Cutter Head.

` No. 241,432'. y PmentwM@1y/10,1881@ N. PETERS, Phuto-Llhognpher,Washington. E C.

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t UNITED STATES PATENT OFFICE.

GEORGE J. SHIMER AND SAMUEL J. SHIMER, OF MILTON, PENNSYLVANIA.

CUTTER-HEAD.

SPECIFICATION forming part of Letters Patent No. 241,432, dated May 10,1881.

Application fnen Mnl-@11 1o, 1881. (trader.)

,To all whom it may concern.-

Bc it known that we, GEORGE J. SHIMER and SAMUEL J. SHIMEE, citizens ofthe United States, residing vat Milton, in the county of Northumberlandand State, ot' Pennsylvania,

. have invented certain new and useful Improvements in Gutter-Heads; andwe do hereby declare 'the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to whichit ap-` pertains to make and use the same, reference beinghad to the accompanying drawings ,`and to letters or iigures ofreference marked thereon, which form a part ot' this specification.

Our invention relates to cutter-heads that are used on matching andmolding machines for matching, grooving, and iinishing the edges oflumber, and particularly to that class wherein bits or cutters areemployed to produce a,

divided cnt and to operate with clearance at the side of eachcuttingedge. A

Ourinvcntion also relates to the peculiar construction ot' the bits orcutters, operating g in pairs, so as to overlap each other on the innerlineof cut, and capable of lateral adjust 4 ment for matching andmolding lumber.

Our invention consists in a cntter-headcomposed of two sections or paits, operating conjointly and capable of lateral adjustment, incombination with bits or cutters having the outline of a certain moldformed on their outer surfaces at an angle with the edges upon whichthey are secured totheir respective sections.

Our invention further consists, in combination with the cutter-headcomposed ot' two sections or parts, of an elastic cushion operatingagainst the movable section.

Our invention further consists, in combination with the cutter-headcomposed ot' t-wo sections or parts, of an elastic cushion or coiledspring and an adjusting means, whereby'the overlapping edges of thecutters of the sections can be increased or decreased.

Our invention further consists in the peculiar construction of the bitorcutter, as will be hereinafter described and claimed.

Our invention further consists in the novel construction and combinationof parts, as will be hereinafter described and specifically claimed.

Figure l of the drawings is a perspective View ofourimproved tool. viewot the saine. of the stationary with its bits or cutters, and showingfully a coiled spring surrounding the hub. Fig. 4 is a perspective viewofthe adjustable section of the cutter-head with its bits or cutters.Fig. 5 is a vertical sectional view, showing the relative position ofall the parts. Fig. 6 isa perspective view ofthe bit or cutter. edgevien' ot' one of the bits, showingthe mode ot' operation upon a piece oflumber.

In the annexed drawings,forming a part of this specification, the letterA represents the cuttenhead, composed ot' two sections or parts, B andC. The section B (see Fig. 3) is constructed with a central hub, D,having at its upper end anexterior screw-threaded portion, a, and at itsbase with re-ent'orced side ianges or segments, E E,directlyoppositeeach other, and arranged in planes at right angles to the axis ofrotation. The section G (see Fig. 4) is constructed with a centralsleeve, F, theinterior diameter of which is a littie greater than theexterior diameter ofthe hub D ot section B, so as to pass over the sameeasily, and to permit ot' vertical adjustment, and is also constructedwith the re-ent'orced side iianges or segments, E2 E2, which arearranged directly opposite each other, as seen in the drawings. The sideflanges of the respective sections are formed with mortises b, toreceive the bits or cutters, and provided with set-screws C at or nearone end, on the upper surface, to secure the bits or cutters to theirseats. rlhe mortises in the respective sections are parallel to eachother, in order that the cutters arranged therein shall move in the sameplane. These sections are made of cast metal with the openings andpassages cored, and should be ofsufi- Fig. 2 is a bottom Fig. 3 is aperspective view cient strength to resist the torsional strain upon thebits when the tool is in operation.

Arranged around the hub D of the section B (see Figs. 3 and 5) is acoiled spring, Hhor its equivalent, having a tension ot sufficientstrength to act as a nut-lock. This coiled spring rests upon the floorof the lower section, and the upper end bears upon the upper sectionwhen adjusted in position, as seen in Fig. 5 of the drawings. The officeof this spring coiled around the hub is to automatisection of thecutter-head Fig. 7 is an IOO cally adjust the upper section upwardly oroutwardly and retain the same in the adjusted position. The downwardadjustment of the upper section is accomplished by the adjusting-nut dengaging with the screw-th reads on the upper end of the hub.

The letter I (see Fig. 6) represents a bit or cutter with twocutting-edges,1and 2,in transverse section, having the shape or outlineto out a certain mold which is formed on the outer surface by planing ormilling. ln this example of a bit for forming a groove the proj eetin gcutting-edge 2 is arranged at an angle to the basev of the bit, or whenit is secured to the head. These cutters are introduced into themortises and properly adjusted in pairs or series," so as to partiallyoverlap each other on the inner line of the cut.

It will be understood that as the cutters wear away they will make thegroove narrower and tongue wider; but to maintain the uniformity of thegroove and tongue the upper section, with its cutters, is adjusted sothat they will overlap each other on the inner' line ot' cut.

The modus operandi of these overlapping bits, for alternating the cutand dividing the chip upon the inner line of cut, is fully eX- plainedin the reissued patent of G. J. Shimer, dated February 12, 1880, and inour patent dated January 11, 1881. i

The parts constituting the tool are put together in the .followingmanner: 0n the hub ot' the lower section is arranged the coiled spring,after which the movable upper section is passed over the hub ot' thelower section, at right angles thereto, until it rests upon the upperend of the coiled spring, when the nut is applied and adjusted to formor constitute the interlocking ofthe sections, as seen in Fig. 1 of thedrawings. The bits are properly adjusted in pairs in the mortises, andsecured in their seats by means of the set-screws, and the desiredoverlap adjustment of the bits or cutters is accomplished by screwingthe nut by means of a suitable wrench down upon the upper section, whichwill give the nice desired adjustment. The bits are sharpened and thecutting-edges adjusted to a common circle in the well-known manner.

It is obvious that as these bits or cutters are worn off by use andrepeated sharpening, their lateral adjustment must equal the inclinationgiven for clearance to their leading points, and that, owing to theconstruction seen in Fig. G, the bits operate with side clearance totheir leading points when they are adjusted to the work in the ordinarymanner.

In lieu of the coiled spring a rubber buffer or cushion may surround thehub, or a number of spiral or flat springs incased between the sections.

We do not wish to corinne ourselves to the precise construction hereindescribed and shown, as slight changes may be made without departingfrom the spirit of the invention.

Vhat we claim as our invention, and desire to secure by Letters Patent,is-

1. A cuttter-head composed ot' two parts operating conjointly andcapable ot' lateral adjustment, the solid bits or cutters ot which havethe outline ot' a given shape formed on their outer surfaces atan anglewith the edges upon which they are secured to their respective sections,substantially as described, and for the purpose set forth.

2. In a cutter-head, the combination, with the two sections composingthe head, ot' an elastic cushion operating upon the movable oradjustable section, substantially as and for the purpose set forth.

I5. In a cutter-head, the combination, with the two sections composingthe head, otl an interposed elastic cushion and an adjustingl means,substantially as and for the purpose set forth'.

4. A bit or cutter for a cutter-head having two cutting-edges intransverse section, the cutting-edge that shapes or forms the mold beingformed on a projection on the face or" the bit or cutter, at an angle tothe base thereof, substantially as described.

5. The improved cutter-head hereinbefore described, consisting of thesection B, movable section C, with their bits, the coiled spring H,

` and adjusting-nut, substantially as described.

ln testimony whereof we affix our signatures in presence ot twowitnesses.

GEO. J. SHIMER. SAMUEL J. SHIMER.

Witnesses E. S. SHIMER, M. F. NoRAnoNK.

